WACKER® 131 - HMA GENERAL GLAZING
WACKER® 131 is a one-part, acid-curing, high-modulus silicone sealant for glazing and industrial applications.
WACKER® 131 cures at room temperature under the action of atmospheric moisture to give a permanently flexible silicone rubber.
• Ready gunnability at low (+5°C) and high (+40°C) temperatures
• Low-shrinkage during vulcanization
• Flexible at low (-40°C) and high temperatures (+180°C)
• Rapid crosslinking: quickly becomes tack-free
• Long shelf life
• High modulus
• Excellent tooling properties
• Adheres exellently to glass, vitrified surfaces, ceramic tiles, many plastics and most paints
• Glass and windows construction
• Sealing of joints between glazing and supporting structure (frame, transoms, mullions)
Restrictions on use
WACKER® 131 should not be used on substrates such as marble, concrete, fibrous cement and mortar, as the product releases acetic acid during vulcanization.
WACKER® 131 should not be used in contact with metals such as lead, copper, brass or zinc due to corrosion.
WACKER® 131 may be discolored in contact with some organic elastomers, e.g. EPDM, APTK and neoprene.
WACKER® 131 is not recommended for sealing of aquaria, please use our ELASTOSIL® 4300.
WACKER® 131 is not recommended for use on natural stone, such as marble, granite, quartzite, as it can cause staining.
WACKER® 131 is not recommended for structural glazing bonding.
WACKER® 131 exhibits good primerless adhesion to wet alkaline substrates and to some metals.
Users must carry out their own tests due to the great variety of substances.
The adhesion can be improved in many cases by pretreatment of the substrates with a primer.
If adhesion difficulties arise please contact our technical service.
The substrate areas that will be in contact with the sealant must be clean, dry and free of all loose material, dust, dirt, rust, oil, and other contaminants. Non-porous substrates should be cleaned with a solvent and a clean, lint-free, cotton cloth. Remove residual solvent before it evaporates with a fresh clean, dry cloth.
WACKER®131 is usually supplied in standard size cartridges that fit all standard caulking guns.
The 'Best use before end' date of each batch is shown on the product label.
Storage beyond the date specified on the label does not necessarily mean that the product is no longer usable. In this case however, the properties required for the intended use must be checked for quality assurance reasons.
WACKER has a global network of specialist distributors at its disposal. Please select an application so that we can suggest suitable contacts.